论文部分内容阅读
1980年秋季,我们在东郭村营造了1000亩杨树丰产(杨麦间作)试验林。杨麦间作是农业生态系统的一个新类型,在农地的小麦田中间种杨树。目前杨树生长茁壮,据1984年秋测定,平均高达13.2米,平均胸径17.2厘米,每亩平均蓄积量2.9802立方米,小麦也连年获得平均亩产747斤的好收成。为了进一步了解杨树丰产林的效益,为今后营造同类形式的丰产林提供科学依据,现将几年来的试验情况总结如下:一、试验地概况试验地设在临汾市吴村镇东郭村,位于东经110°30′,北纬36°04′,距临汾市约15公里。试验地为平川河流二阶地,地形平坦
In the autumn of 1980, we built 1000 mu of poplar experiment (Yangmai intercropping) experimental forest in Dongguocun. Poplar intercrops is a new type of agroecosystem that poplar plants in the middle of wheat fields in agricultural lands. At present, the poplar grows robustly. According to the autumn 1984 test, the average height is 13.2 meters and the average diameter at breast height is 17.2 centimeters. The average stock volume per acre is 2.9802 cubic meters. Wheat also obtains a good yield of 747 pounds per mu in successive years. In order to further understand the benefits of poplar forest production, and provide a scientific basis for the future to create similar forms of high yield forest, now the test situation is summarized as follows: First, the experimental site of the experiment located in Lincun Wucun Dongguocun, located in the east longitude 110 ° 30 ’, latitude 36 ° 04’, about 15 km from Linfen City. The test ground is the second-order land of the Hirakawa River and the terrain is flat